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68744793 = 31319113821
BaseRepresentation
bin1000001100011…
…11011001011001
311210100121010110
410012033121121
5120044313133
610453234533
71463215065
oct406173131
9153317113
1068744793
1135893a87
121b032a49
131131c3c0
1491b6aa5
15607dc63
hex418f659

68744793 has 32 divisors (see below), whose sum is σ = 104952960. Its totient is φ = 39674880.

The previous prime is 68744791. The next prime is 68744801. The reversal of 68744793 is 39744786.

It is a happy number.

It is not a de Polignac number, because 68744793 - 21 = 68744791 is a prime.

It is a super-2 number, since 2×687447932 = 9451693129225698, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68744791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83323 + ... + 84143.

It is an arithmetic number, because the mean of its divisors is an integer number (3279780).

Almost surely, 268744793 is an apocalyptic number.

It is an amenable number.

68744793 is a deficient number, since it is larger than the sum of its proper divisors (36208167).

68744793 is a wasteful number, since it uses less digits than its factorization.

68744793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969.

The product of its digits is 1016064, while the sum is 48.

The square root of 68744793 is about 8291.2479760287. The cubic root of 68744793 is about 409.6502927220.

The spelling of 68744793 in words is "sixty-eight million, seven hundred forty-four thousand, seven hundred ninety-three".

Divisors: 1 3 13 19 39 57 113 247 339 741 821 1469 2147 2463 4407 6441 10673 15599 27911 32019 46797 83733 92773 202787 278319 608361 1206049 1762687 3618147 5288061 22914931 68744793